Governing device for fluid-compressors.



'G. WAINWRIGHT. GOVERNING DEVICE FOR FLUID GOMPRESSORS.

APPLICATION FILED MAY 8, 1912.

1,081,1 7'7. Patented Dec.9, 1913.

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CHARLES WAINWR-IGHT, OF ERIE, PENNSYLVANIA.

GOVERNING DEVICE FOR FLUID-COMPRESSORS.

Specification of Letters Patent.

-atented Dec. 9, 1913.

Application filed May 8, 1912. Serial No. 695,889.

To all whom, it may concern:

Be it known that I, CHARLES lVAiN- WRIGHT, a citizen of the UnitedStates, residing at Erie, in the county of Erie and State ofPennsylvania, have invented new and useful Improvements in GoverningDevices for Fluid-Compressors, of which the following is aspecification.

The invention has for its general object the production of a simple,cheap and effective governing device for fluid compressors. And to thisend the invention consists in a governing device arranged to operate asan inlet valve on the intake of the compressor until such time as apredetermined pressure is had in the container of the compressor andthen to effect constant communication between the interior of the pumpor compressor apparatus and the source of fluid supply for the sameuntil such time as the container or receiver pressure falls to a pointbelow the aforesaid predetermined or operating pressure.

Other objects will appear and be better understood from that embodimentof my in vention of which the following is a specification, referencebeing had to the accompanying drawings forming a part hereof, in which:

Figure l is a detail vertical longitudinal section with the regulatingdevice in closed position, and the piston at or near the end of thecompression stroke. Fig. 2 is a vertical cross section on the line 22 ofFig. 1 with the controller or regulating device removed. Fig. 3 is adetail front elevation of the valve. Fig. f is a detail end view of thesame. Fig. 5 is a front elevation of the valve seat. Fig. 6 is avertical cross section. of the same. Fig. 7 is an enlarged detailsection of the regulator in closed position. Fig. 8 is a view similar toFig. 7 but showing the regulator in open position. Fig. 9 is a viewsimilar to Figs. 7 and 8 showing the means operated by the predeterminedreceiver pressure for holding the valve in the position shown in Fig. 8.

Referring now to the drawings a indicates generally the compressing orpump mechanism which is of suitable construction and arranged to beoperated by a motor of any desired construction.

The fluid to be compressed is drawn from the atmosphere or other sourceof supply, through a passage 5 into a chamber 6 and through a port 7into the cylinder 8. This drawing in of the fluid is effected by thepiston 9 when the same moves to the right in Fig. 1.

A barrel or bushing 10 is confined in the chamber 6 by means of plates11-11 suitably fastened to the cylinder and arranged so as to seal theopposite ends of the chamber. The barrel or bushing is suitably heldagainst turning in the chamber 6 and at its opposite ends has enlargedcircular heads 12-12 which fit into counterbores 13-13 at the oppositeends of the chamber 6. Atleast one of the heads 12 is detachably connected to the barrel and is removed preparatory to placing the barrel inthe chamber or removing it therefrom. A port or passage 14, connects thepassage 5 with the interior of the barrel 10 and a port or passage 15establishes communication between the interior of the barrel and thechamber 6 or port 7. The port or passage 15 is controlled by a valve 16which is mounted on a horizontal pivot or pint-le 17 carried by theheads 12-12 or otherwise suitably connected to the barrel. The barrel isformed with a flat face or side 18 and it is in this face that the portor passage 15 is formed. The plane of the face is oblique to a linedrawn vertically to the axis of the barrel when the parts are arrangedas shown in the drawings. WVith this arrangement the valve 16 extendsparallel with the face or side 18 and is normally held seated or bearingon the face 18 and over the passage 15 by gravity. The

mass of the valve, however, is not so great as the pressure present inthe passage 5 and interior of the barrel when the piston is moving tothe right in Fig. 1, so that during such movement of the piston, thevalve will lift under the pressure in the barrel and chamber 5 so as toadmit of the passage of the air or fluid into the cylinder. \Vhen thepressure in the barrel and cylinder are equalized at the end of thestroke to the right in Fig. 1, the valve will close by gravity and soremain throughout the compression stroke of the piston. This action ofthe valve will be effected upon each reciprocation of the piston anduntil a predetermined pressure has been attained in the receiver of thecompressor.

Referring now to Fig. 9, the cylinder 19 which extends through thecylinder 8 and an opening in the rear side of the barrel 10, is suitablyfastened or locked to the cylinder 8, such as by a screw thread 20. Apipe (not shown) or other suitable means, connects the cylinder 19 withany desired part of the receiver (not shown) of the compressor or with asuitable governing device (not shown) located between the cylinder andthe receiver and connected to the receiver;

A piston or plunger 21 located in the cylinder is forced outwardly by aspring 22 which surrounds a plunger rod 23 that eX- tends through theinner end of the cylinder and to a point adjacent to the valve 16.

Now when a predetermined pressure sufficient to overcome the resistanceof the spring of the controlling device (not shown) or the spring 22, asthe case may be, is obtained in the receiver of the compressor, suchpressure, upon entering the cylinder 19, will project the piston rodinwardly or to the right in Fig. 9 and well into the path of movement ofthe valve 16. By virtue of the presence of the piston rod in the path ofmovement of the valve, the valve will be held in the open position asshown in Fig. 8 so that the piston on its compression stroke will forcethe air through passage 10, the barrel and passage 5 and into the sourceof fluid supply. Therefore the only resistance to the compression strokeof the piston, will be that offered by the pressure in the source offluid supply which is seldom greater than atmospheric pressure. Thus, itwill be seen that when the rod holds the valve in the position shown inFig. 8, the cylinder will be what is known in the art as unloaded and itwill remain so unloaded until such time as the receiver pressure isreduced to a point which will admit the spring 22 or the spring of theregulating device (not shown) to assume its normal position.

Although I have shown the device as associated with a single actingcompressor, it will be understood that it may be used with compressorsof the double acting and single or multiple stage types. It will befurther observed that the valve may, if desired, be used without theunloading apparatus and may be arranged in any of the fluid passages, z.c. in the inlet or discharge passages or both of the compressor.

lVhat I claim as new is 1. In a fluid compressor, the combination withthe pump mechanism having a valve chamber and a plurality of fluidpassages communicating with said valve chamber; of a barrel arranged insaid chamber and having a flattened side portion and also portscommunicating with said fluid passages, one of said ports being arrangedin the said fiattened side portion and a pivoted gravity valve forcontrolling the passage through the said ports.

2. In a fluid compressor, the combination with the pump mechanism havinga valve chamber and a plurality of fluid passages communicating withsaid valve chamber; of a barrel arranged in said chamber and having aflattened side portion and also having ports communicating with saidfluid passages, one of said ports being arranged in the said flattenedside portion, and a valve pivoted to the outer surface of the barrel andarranged for controlling the passage through the said ports.

3. In a fluid compressor, the combination with the pump mechanism havinga valve chamber and a plurality of fluid passages communicating withsaid valvechamber; of a barrel arranged in said chamber and having aflattened side portion and also having ports communicating with saidfluid passages, one of said ports being arranged in the said flattenedside portion of the barrel,

a valve pivotally connected to the barrel for controlling the passagethrough the said ports, and means extending into the barrel and operablewith a predetermined pressure in the receiver of the compressor tocontrol the operation of said valve.

In testimony whereof I have aflixed my signature in presence of twowitnesses.

CHARLES WAINWRIGHT. Witnesses:

F. J. CARNEY, JOHN A. DONEGA-N.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

